The best thing about simple push is that it has all your contacts in one place, so you don't have to go searching through them each time! I really like how easy this service was compared with other services we tried out earlier such as Intercom (which had an annoying video tutorial).
Nothing at present but if there were any issues or anything else they would be fixed quickly by their team of friendly support staff who are always available via live chat/email 24 hours per day 7 days week year round - very helpful indeed when needed!! There's nothing much i dislike actually apart from maybe being able do more things than just send emails which seems odd given its purpose however having said that everything works fine once set up correctly & can then easily add new features later without problem etc! We use simply-push mainly because our customers love receiving messages directly into WhatsApp.